Artur Davis, the former Democratic Congressman representing Tuscaloosa and once a staunch Obama supporter, will address the GOP convention. Davis left Alabama and the Democratic Party after a landslide loss to Ron Sparks in the 2010 gubernatorial primary. He has since switched the Republican Party.

The former congressman served as Obama’s Alabama campaign chairman in 2008 and spoke prominently at the Democratic Convention. He was considered a rising star in the party.

Davis served as Barack Obama’s Alabama campaign chairman four years ago and gave the seconding speech for Obama’s nomination at the Democratic National Convention. But the Republican National Convention announced Thursday that Davis will speak later this month at the GOP convention in Tampa, Fla., to support Mitt Romney.

Davis lost Alabama’s Democratic primary for governor in 2010. Then he moved to Virginia and switched parties. Davis said Thursday the talk by Obama that inspired people four years ago has not been backed up by actions to increase jobs. Instead, he said it has resulted in job-killing mandates and trillion dollar deficits.